https://my.clevelandclinic.org/health/articles/22355-parathyroid-hormone
Learn about parathyroid hormone (PTH), a hormone that controls calcium, phosphorus and vitamin D levels in your body. Find out what causes high or low PTH levels and how they affect your health.

https://www.webmd.com/a-to-z-guides/parathyroid-hormone-blood-test
A PTH blood test measures the hormone that controls calcium levels in your blood. Learn why you may need this test, how to prepare for it, and what the results mean.

https://en.wikipedia.org/wiki/Parathyroid_hormone
Parathyroid hormone (PTH), also called parathormone or parathyrin, is a peptide hormone secreted by the parathyroid glands that regulates the serum calcium concentration through its effects on bone, kidney, and intestine.. PTH influences bone remodeling, which is an ongoing process in which bone tissue is alternately resorbed and rebuilt over time. PTH is secreted in response to low blood

https://www.mayoclinic.org/diseases-conditions/hyperparathyroidism/symptoms-causes/syc-20356194
Hyperparathyroidism is a condition where the parathyroid glands produce too much parathyroid hormone, which affects the calcium and phosphorus levels in the body. Learn about the types, causes, risk factors, complications and treatment options for this disorder.

https://medlineplus.gov/lab-tests/parathyroid-hormone-pth-test/
A PTH test measures the level of PTH in your blood, which controls the calcium level in your body. Learn why you may need a PTH test, how to prepare for it, and what the results mean.

https://www.healthline.com/health/pth
A PTH test measures the level of parathyroid hormone in your blood, which helps regulate calcium levels. Learn why you may need this test, what it involves, and what the results mean for your health.

https://my.clevelandclinic.org/health/body/parathyroid-gland
What is the function of the parathyroid glands? Your parathyroid glands have one job: making and releasing parathyroid hormone (PTH). Together, PTH and another hormone — calcitonin — tightly control the levels of calcium in your bloodstream. Having too much or too little calcium in your blood can be associated with health issues.

https://my.clevelandclinic.org/health/diseases/14454-hyperparathyroidism
Hyperparathyroidism is a condition where your parathyroid glands produce too much parathyroid hormone (PTH), which can cause high calcium levels in your blood. Learn about the types, causes, symptoms, diagnosis and treatment of this condition from Cleveland Clinic.

https://www.msdmanuals.com/-/media/Manual/LabTests/ParathyroidHormonePTHTest.html
PTH controls the level of calcium in the blood. Calcium is a mineral that keeps your bones and teeth healthy and strong. It's also essential for the proper functioning of your nerves, muscles, and heart. If calcium blood levels are too low, your parathyroid glands will release PTH into the blood. This causes calcium levels to rise.

https://www.ncbi.nlm.nih.gov/books/NBK499940/
In the blood, the sensitive process of calcium and phosphate homeostasis is maintained primarily by an appropriately functioning parathyroid gland. The parathyroid gland is comprised of 4 small glands located posteriorly to the thyroid in the middle aspect of the anterior neck. The parathyroid gland secretes parathyroid hormone (PTH), a polypeptide, in response to low calcium levels detected

https://www.mountsinai.org/health-library/tests/parathyroid-hormone-pth-blood-test
Why the Test is Performed. PTH is released by the parathyroid glands. The 4 small parathyroid glands are located in the neck, near or attached to the back side of the thyroid gland. The thyroid gland is located in the neck, just above where your collarbones meet in the middle. PTH controls calcium, phosphorus, and vitamin D levels in the blood.

https://www.msdmanuals.com/home/hormonal-and-metabolic-disorders/parathyroid-disorders/overview-of-parathyroid-function
Learn how the parathyroid glands secrete PTH, which regulates calcium levels in the blood and tissues. Find out the causes and effects of hypocalcemia and hypercalcemia, and how to test PTH levels.

https://www.verywellhealth.com/hyperparathyroidism-7498311
Hyperparathyroidism is a condition where the parathyroid gland produces too much PTH, leading to high blood calcium levels. Learn about the types, causes, symptoms, diagnosis, and treatment of primary and secondary hyperparathyroidism.

https://www.ucsfhealth.org/medical-tests/parathyroid-hormone-(pth)-blood-test
PTH controls calcium, phosphorus, and vitamin D levels in the blood. It is important for regulating bone growth. Your provider may order this test if: You have a high calcium level or low phosphorus level in your blood. You have severe osteoporosis that cannot be explained or does not respond to treatment. You have kidney disease.

https://healthy.kaiserpermanente.org/health-wellness/health-encyclopedia/he.parathyroid-hormone-pth-test.hw8101
A parathyroid hormone (PTH) blood test measures the level of parathyroid hormone in the blood. This test is used to help identify hyperparathyroidism, to find the cause of abnormal calcium levels, or to check the status of chronic kidney disease. PTH controls calcium and phosphorus levels in the blood. PTH is made by the parathyroid glands

https://medlineplus.gov/ency/article/003690.htm
PTH is released by the parathyroid glands. The 4 small parathyroid glands are located in the neck, near or attached to the back side of the thyroid gland. The thyroid gland is located in the neck, just above where your collarbones meet in the middle. PTH controls calcium, phosphorus, and vitamin D levels in the blood.

https://www.mayoclinic.org/diseases-conditions/hypoparathyroidism/symptoms-causes/syc-20355375
Tingling or burning in the fingertips, toes and lips. Muscle aches or cramps in the legs, feet, stomach or face. Twitching or spasms of muscles, particularly around the mouth, but also in the hands, arms and throat. Fatigue or weakness. Other signs and symptoms associated with hypoparathyroidism can include: Painful menstrual periods.

https://www.uptodate.com/contents/parathyroid-hormone-secretion-and-action
Learn how PTH regulates calcium and phosphate homeostasis, and how it is affected by calcitriol and FGF23. This article requires subscription to access the full content.

https://www.merckmanuals.com/professional/endocrine-and-metabolic-disorders/parathyroid-disorders/overview-of-parathyroid-function
Learn about the role of parathyroid glands and parathyroid hormone (PTH) in regulating calcium and phosphate metabolism. Find out how PTH acts on kidneys, intestines, and bones, and how to diagnose and treat parathyroid disorders.

https://www.testing.com/tests/parathyroid-hormone-pth/
PTH is a chemical made by the parathyroid glands. These small, almond-shaped glands are located in the neck, near or behind the thyroid gland. PTH controls blood levels of calcium and phosphorus. The parathyroid glands produce more PTH when calcium levels in the body are low. PTH sends chemical messages to other organs to balance blood calcium

https://www.kidney.org/atoz/content/secondary-hyperparathyroidism
Secondary hyperparathyroidism occurs when the parathyroid glands become enlarged and release too much PTH, causing a high blood level of PTH. There are several reasons why this happens in patients with kidney disease: Higher blood phosphorus levels. The kidneys cannot make active vitamin D (needed to absorb calcium)

https://www.labcorp.com/tests/015610/parathyroid-hormone-pth-intact
PTH is an 84-amino-acid peptide hormone which is responsible for the regulation of serum calcium levels within a narrow range. PTH is secreted in response to decrease in serum calcium levels by increasing the renal reabsorption of calcium and lowering reabsorption of phosphorus. The measurement of PTH is a very useful tool in the differential